Continuous-current machine and apparatus.



PATENTED OUT. 13, 1903,. M. ,DERI. CONTINUOUS CURRENT MACHINE AND APPARATUS.

APPLICATION FILED MAR. 6, l903.

N0 MODEL.

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WITNESSES:

ATTORNEKK mi, Norms Pm UNITED STATES Patented October 13, 19025.

PATENT OFFICE.

MAX DERI, OF VIENNA, AUSTRIA-HUNGARY, ASSIGNOR TO STANLEY ELECTRIC MANUFACTURING COMPANY, OF PITTSFIELD, MASSA- CHUSETTS, A CORPORATION OF NEW JERSEY.

CONTINUOUS-CURRENT MACHINE AND APPARATUS.

SPECIFICATION forming part of Letters Patent No. 741,234, d t d O tobe 13, 1903.

Application filed March 6,1903. Serial No. 146,650. (No model.)

To all whom, it may concern.-

Be it known that I, MAX DERI, a subject of the Emperor of Austria-Hungary, and a resident of Vienna, Austria I-Iungary, have invented certain Improvements in Continuous- Current Machines and Apparatus, of which the following is a specification.

My invention relates to improvements in compensated direct-current dynamo-electric machines of the type described in the specifications of Letters Patent No. 614,373, dated November 15, 1898, and of Letters Patent No. 670,557, dated March 26, 1901. I11 this type of machine the field-magnet has not the usual polar projections of direct-current machines, but is so arranged that the iron of the fieldmagnet is equally distributed around and equidistant from the armature,the shunt fieldmagnet coils and the series compensating coils being more or less evenly distributed around the field magnet and embedded therein.

The object of my present invention is to provide an improved form of field-m agnet for this type of machine and includes certain features of construction and arrangement, which with their accompanying advantages are set out hereinafter.

Referringto the drawings, Figure 1 is a diagrammatic development of a machine embodying my invention,and Fig. 2 is a sectional view showing the physical construction of the field-magnet.

The armature of the machine may be of any one of various well-known types having a multiplicity of coils connected to a commutator. The ends and sides of anumber of such coils are indicated in Fig. 1 as h and h, respectively, while the commutator is represented as a.

t represents the field-magnet ring and has equidistant slots Z) 011 its inner periphery parallel to the axis of the machine. The fieldmagnet b may or may not be laminated; but in order to facilitate construction I prefer to build it of laminations. In the slots 7) are placed the compensating coils c and c, which are connected to the brushes a in such a way that the current passing through the conductors of the coils will flow in a direction opposite to that in which the current is flowing in the neighboring.armature-conductors. Such methods of connection have been set forth in the Letters Patent above mentioned issued to me and are now well known to those skilled in the art.

The slotting of the field-magnet as above set out produces a toothed ring. In order to energize the fieldmagnet, I cut away certain of the teeth and provide coils d, having sides cl, which occupy the space cut away. By this construction I am enabled to wind the finewire shunt-coils on a former, which decreases the cost of construction and facilitates the proper insulation of the coils.

The coil 0, as indicated in Fig. 1, furnishes the commutating iield by magnetizing the tooth e, situated midway between the energizing-coils. This commutating field can be widened, if desired, by omitting one or more slots between the energizing-coils, as indicated at E in Fig. 3. am thus enabled to provide a range of greater or less extent through which the commutator-brushes may be shifted without producing sparking regardless of the load, speed, or direction of rotation.

By the construction and arrangement described I not only provide a machine of this character which perfectly and uniformly neutralizes any tendency to armature reaction and very effectively commutates, but the machine is mechanically simple, compact, and well balanced.

I do not desire to be limited to the specific embodiment of my invention shown, since changes therein which attain the objects of my invention and are within the scope of the appended claims may readily be made by those skilled in the art.

Having thus fully described my invention, what I claim, and desire to protect by these Letters Patent, is

1. In a dynamo-electric machine for direct currents, a field-magnet in the form of a continuous ring, slotted on its inner periphery, and carrying exciting-coils, and equally, or nearly equally, distributed compensating coils in the said slots.

2. In a dynamo-electric machine for direct currents, a field-magnet in the form of a con- ICO tinuous ring, having teeth on its inner periphery and compensating coils between said teeth, and having certain of its teeth cut away and exciting-coils occupying the space thus cut away.

3. I11 a dynamo-electric machine for direct currents, a fieldmagnet in the form of a continuous ring, exciting-coils embedded therein, and compensating coils carried in evenlydistributed. slots 011 its inner periphery, certain of the slots between the excitingcoils being omitted.

4. In a dynamo-electric machine for direct currents, a field-magnet in the form of a continuous ring slotted on its inner periphery, certain of the slots being larger than the others, having compensating coils in all the slots and having exciting-coils and compensating coils in the larger slots.

5. In a dynamo-electric machine for direct currents, a field-magnet in the form of a continuous ring having teeth on its inner periphery, the teeth midway between the polar regions being broader than the remaining teeth.

(5. In a dynamo-electric machine for direct currents, at field-magnet in the form of a con tinuous ring, slotted on its inner periphery, and having exciting-coils in certain of the slots and compensating coils in all the slots, the slots containing the exciting-coils being wider than the remaining slots.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MAX DERI.

\Vitnesses:

ALvEsTo S. lioonn, AUGUST Focenn. 

